package filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.io.IOException;


@WebFilter("/*")
public class LoginFilter implements Filter {
    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        HttpServletRequest req = (HttpServletRequest) request;
        String url = req.getRequestURL().toString();
        if(url.contains("login")){
            chain.doFilter(request,response);
            return;
        }
        HttpSession session = req.getSession();
        Object user = session.getAttribute("user");
        if(user !=null){
            chain.doFilter(request,response);
        }else{
            req.getRequestDispatcher("/login.jsp").forward(request,response);
        }
//        chain.doFilter(request,response);
    }
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
    }
    @Override
    public void destroy() {
    }
}
